Calcite Sm-Nd isochron age of the Shuiyindong Carlin-type gold deposit, Guizhou, China

Su, Wenchao; Hu, Ruizhong; Xia, Bin; Xia, Yong; Liu, Yuping

doi:10.1016/j.chemgeo.2008.10.030

Cited by 144 publications

(98 citation statements)

References 19 publications

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“…4 Uysal et al (2007) and Su et al (2009). Therefore, such remarkable range in 147 Sm/ 144 Nd ratios, allows placing an important constraints on the timing of mineralization (Chesley et al, 1991(Chesley et al, , 1994Peng et al, 2003a).…”

Section: Sm-nd Isochron Agementioning

confidence: 99%

“…The faults can be divided into four major trends oriented NNE, WNW, NNW and EN, respectively. The basal tectonic frame in the region was formed in the Yanshanian orogeny (190-65 Ma) , an important tectonic event in China (Hu et al, 2002(Hu et al, , 2007aPeng et al, 2003a;Su et al, 2009), with widespread tectonism and magmatism that led to large-scale metal mineralization including W, Sn, Pb, Zn, Nb and Ta in SE China and Au, Sb, As, Tl and Hg in SW China (Chen, 1992;Hu et al, 2007a). The exposed country rocks mainly consist of Ordovician, Silurian, Devonian, Carboniferous and Permian strata.…”

Section: Geological Settingmentioning

confidence: 99%

“…The analytical procedure followed, is as described in Peng et al (2003a) and Su et al (2009 (Ludwig, 2005).…”

Section: Sm-nd Isotopic Analytical Proceduresmentioning

confidence: 99%

“…Generally, carbonate shows LREE-enriched, low Sm/Nd ratio and in narrow range (0.1-0.3) (Graf, 1984). Nevertheless, a few calcites show MREE-and HREE-enriched, higher Sm/ Nd ratio and wider range (0.1-9) (Peng et al, 2003a;Uysal et al, 2007;Su et al, 2009). Hu et al, 2002 andDai, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, hydrothermal minerals such as fluorite, scheelite, tourmaline and calcite have been successfully used to determine Sm-Nd ages for gold (Bell et al, 1989;Anglin et al, 1996;Turner et al, 2003;Roberts et al, 2006;Su et al, 2009), tungsten (Darbyshire et al, 1996;Eichhorn et al, 1997), antimony (Peng et al, 2003a(Peng et al, , 2003b, other hydrothermal deposits (Halliday et al, 1990;Chesley et al, 1991Chesley et al, , 1994Jiang et al, 2000) and fluid-flow event (Uysal et al, 2007). These minerals are ideal for Sm-Nd dating because they usually contain high amounts of Sm and Nd, and display enrichment of MREE and HREE, corresponding to a large variation in Sm/Nd ratios.…”

Section: Introductionmentioning

confidence: 99%

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Sm-Nd geochronology, REE geochemistry and C and O isotope characteristics of calcites and stibnites from the Banian antimony deposit, Guizhou Province, China

et al. 2012

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2001), a full understanding of the geodynamical setting, fluid evolution, and genesis of the epithermal antimony mineralization has been seriously hampered. Similar to other epithermal deposits (including Au, Hg, As and Tl) in southwestern China, the ore-forming ages of antimony deposits are poorly constrained due to the absence of minerals suitable for isotopic dating and the absence of ore-related intrusions in or near these deposits.According to mineral composition of ores and genesis, antimony deposits are subdivided into epithermal (e.g., Xikuangshan and Qinglong, China; Ashat, Roundnjany) and metamorphogene-hydrothermal (Woxi, China; La Lucette, France; Gravelot, South Africa) (Obolensky et al., 2007), and they are usually hosted within black shales or limestones (Williams-Jones and Norman, 1997;An and Zhu, 2010). The Sb-rich sedimentary rocks and metasedimentary rocks from Precambrian and palaeozoic constitute a possible source of Sb (Peng et al., 2003a;Fan et al., 2004;Peng and Frei, 2004 The Banian sediment-hosted antimony deposit is a medium-sized deposit located in the Dushan County, South Guizhou, China. Calcite is the dominant gangue mineral and can be divided into two types: white and pink. Pink calcite is intimately associated with mineralization. Sm-Nd dating of five white calcites yield an isochron age of 128.2 ± 3.2 Ma, with initial ε Nd = -4.3 and MSWD = 0.54, while six pink calcites yield an identical age of 126.4 ± 2.7 Ma with initial ε Nd = -6.0 and MSWD = 0.68. These new age constraints suggest that the Banian deposit formed during the late Yanshanian.Negative initial ε Nd values, C (-0.5 to -1.8), O (12.5 to 14.6) isotopic characteristics of calcites, and field observations of abundance of vuggy open spaces, all suggest significant interaction between fluid and wall rocks. Calcites are characterized by strongly LREE-depleted and MREE-and HREE-enriched (LREE/HREE = 0.11-0.61). Stibnites are LREEenriched, and MREE-and HREE-depleted (LREE/HREE = 105-500). Wall rocks are characterized by moderate LREEenriched (LREE/HREE = 6.2-12). Pink calcites are more enriched in LREE (LREE/HREE = 0.11-0.61) than white calcites (LREE/HREE = 0.11-0.23), while the concentration of HREE remains nearly constant in both. The high contents of Fe and Mn in calcites and the negative correlation between Fe+Mn (ppm) and LREE/HREE ratios suggest that the Fe-Mn impurities in calcites may dominate the enrichment of MREE and HREE in calcites from the Banian deposit.

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Section: Sm-nd Isochron Agementioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

“…The analytical procedure followed, is as described in Peng et al (2003a) and Su et al (2009 (Ludwig, 2005).…”

Section: Sm-nd Isotopic Analytical Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sm-Nd geochronology, REE geochemistry and C and O isotope characteristics of calcites and stibnites from the Banian antimony deposit, Guizhou Province, China

et al. 2012

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Geology, geochemistry, and genesis of the Dashui Carlin‐type gold deposit in the West Qinling orogenic belt, Gansu Province, China

2017

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The Dashui gold deposit occurs in the south of West Qinling orogenic belt where is belonged to a famous gold triangle area named “Shan‐Gan‐Chuan” in Northwest China. The presence of native Au associated with hematite alteration is unique in China. The ore bodies at Dashui mainly occur in the limestone and dolomitic limestone units within the Lower Triassic Maresongduo Formation. The granodioritic dykes that intrude the Triassic sedimentary rocks are locally mineralized because of later carbonate alteration. The ore bodies are vein, lenticular, cystic, and dendritic in shape and are controlled by NW‐, NNE‐ (near N‐S‐), and E‐W‐trending faults. Gold mineralization occurs commonly at fault intersections and contact zones between the carbonate and magmatic rocks. The NNE‐ (near N‐S‐) trending faults and associated pinnate fractures are most favorable loci for gold deposition. The metallic minerals include native Au, pyrite, cinnabar, and marcasite, which are mostly overprinted by an oxidized mineral assemblage of hematite and limonite. Gold mineralization is closely associated with decalcification, silicification, and carbonate alterations. Gold content in altered samples correlates with Si enrichment and Ca and Mg depletions. Rare earth elements (REE) increase with Al2O3 and Fe2O3 in altered carbonate rocks, indicating that an enrichment of REE may be closely related to argillic alteration and supergene weathering. The REE patterns of altered carbonate rocks are more likely consistent with granodiorite instead of the ones of fresh carbonate rocks. Moreover, δ34S values of Dashui deposit ranging from −1.8‰ to 4.1‰ indicate that the deep‐sourced magmatic hydrothermal fluids may have worked during the early stage mineralization. Altered carbonate rocks show higher δ13C and lower δ18O values than those of the original host rock. Therefore, the REE, S, C, and O data suggest that the ore‐forming fluids may be magmatic derived and later interact and exchange with host rock and meteoric water. The Dashui gold deposit is characterized by structural and stratigraphic controls; Au–As–Sb–Hg geochemical association; alteration of decalcification, silicification, and argillization; low base‐metals; high Au/Ag ratio; and low δ18O values. These features are consistent with Carlin‐type Au deposits in Western USA, suggesting that the Dashui deposit is a Carlin‐type deposit that formed in the Middle Jurassic to Early Cretaceous (170 to 135 Ma).

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Mineralogy and geochemistry of gold-bearing arsenian pyrite from the Shuiyindong Carlin-type gold deposit, Guizhou, China: implications for gold depositional processes

Zhang

et al. 2011

Miner Deposita

110

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Calcite Sm-Nd isochron age of the Shuiyindong Carlin-type gold deposit, Guizhou, China

Cited by 144 publications

References 19 publications

Sm-Nd geochronology, REE geochemistry and C and O isotope characteristics of calcites and stibnites from the Banian antimony deposit, Guizhou Province, China

Sm-Nd geochronology, REE geochemistry and C and O isotope characteristics of calcites and stibnites from the Banian antimony deposit, Guizhou Province, China

Geology, geochemistry, and genesis of the Dashui Carlin‐type gold deposit in the West Qinling orogenic belt, Gansu Province, China

Mineralogy and geochemistry of gold-bearing arsenian pyrite from the Shuiyindong Carlin-type gold deposit, Guizhou, China: implications for gold depositional processes

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